image_space.cc revision c7cb1901b776129044a4ad3886fd6450e83df681
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "image_space.h" 18 19#include "base/stl_util.h" 20#include "base/unix_file/fd_file.h" 21#include "gc/accounting/space_bitmap-inl.h" 22#include "mirror/art_method.h" 23#include "mirror/class-inl.h" 24#include "mirror/object-inl.h" 25#include "oat_file.h" 26#include "os.h" 27#include "runtime.h" 28#include "space-inl.h" 29#include "utils.h" 30 31namespace art { 32namespace gc { 33namespace space { 34 35Atomic<uint32_t> ImageSpace::bitmap_index_(0); 36 37ImageSpace::ImageSpace(const std::string& name, MemMap* mem_map, 38 accounting::SpaceBitmap* live_bitmap) 39 : MemMapSpace(name, mem_map, mem_map->Begin(), mem_map->End(), mem_map->End(), 40 kGcRetentionPolicyNeverCollect) { 41 DCHECK(live_bitmap != nullptr); 42 live_bitmap_.reset(live_bitmap); 43} 44 45static bool GenerateImage(const std::string& image_file_name, std::string* error_msg) { 46 const std::string boot_class_path_string(Runtime::Current()->GetBootClassPathString()); 47 std::vector<std::string> boot_class_path; 48 Split(boot_class_path_string, ':', boot_class_path); 49 if (boot_class_path.empty()) { 50 *error_msg = "Failed to generate image because no boot class path specified"; 51 return false; 52 } 53 54 std::vector<std::string> arg_vector; 55 56 std::string dex2oat(GetAndroidRoot()); 57 dex2oat += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 58 arg_vector.push_back(dex2oat); 59 60 std::string image_option_string("--image="); 61 image_option_string += image_file_name; 62 arg_vector.push_back(image_option_string); 63 64 arg_vector.push_back("--runtime-arg"); 65 arg_vector.push_back("-Xms64m"); 66 67 arg_vector.push_back("--runtime-arg"); 68 arg_vector.push_back("-Xmx64m"); 69 70 for (size_t i = 0; i < boot_class_path.size(); i++) { 71 arg_vector.push_back(std::string("--dex-file=") + boot_class_path[i]); 72 } 73 74 std::string oat_file_option_string("--oat-file="); 75 oat_file_option_string += image_file_name; 76 oat_file_option_string.erase(oat_file_option_string.size() - 3); 77 oat_file_option_string += "oat"; 78 arg_vector.push_back(oat_file_option_string); 79 80 arg_vector.push_back(StringPrintf("--base=0x%x", ART_BASE_ADDRESS)); 81 82 if (kIsTargetBuild) { 83 arg_vector.push_back("--image-classes-zip=/system/framework/framework.jar"); 84 arg_vector.push_back("--image-classes=preloaded-classes"); 85 } else { 86 arg_vector.push_back("--host"); 87 } 88 89 const std::vector<std::string>& compiler_options = Runtime::Current()->GetImageCompilerOptions(); 90 for (size_t i = 0; i < compiler_options.size(); ++i) { 91 arg_vector.push_back(compiler_options[i].c_str()); 92 } 93 94 std::string command_line(Join(arg_vector, ' ')); 95 LOG(INFO) << "GenerateImage: " << command_line; 96 return Exec(arg_vector, error_msg); 97} 98 99ImageSpace* ImageSpace::Create(const char* original_image_file_name) { 100 if (OS::FileExists(original_image_file_name)) { 101 // If the /system file exists, it should be up-to-date, don't try to generate 102 std::string error_msg; 103 ImageSpace* space = ImageSpace::Init(original_image_file_name, false, &error_msg); 104 if (space == nullptr) { 105 LOG(FATAL) << "Failed to load image '" << original_image_file_name << "': " << error_msg; 106 } 107 return space; 108 } 109 // If the /system file didn't exist, we need to use one from the dalvik-cache. 110 // If the cache file exists, try to open, but if it fails, regenerate. 111 // If it does not exist, generate. 112 std::string image_file_name(GetDalvikCacheFilenameOrDie(original_image_file_name)); 113 std::string error_msg; 114 if (OS::FileExists(image_file_name.c_str())) { 115 space::ImageSpace* image_space = ImageSpace::Init(image_file_name.c_str(), true, &error_msg); 116 if (image_space != nullptr) { 117 return image_space; 118 } else { 119 LOG(WARNING) << error_msg; 120 } 121 } 122 CHECK(GenerateImage(image_file_name, &error_msg)) 123 << "Failed to generate image '" << image_file_name << "': " << error_msg; 124 ImageSpace* space = ImageSpace::Init(image_file_name.c_str(), true, &error_msg); 125 if (space == nullptr) { 126 LOG(FATAL) << "Failed to load image '" << original_image_file_name << "': " << error_msg; 127 } 128 return space; 129} 130 131void ImageSpace::VerifyImageAllocations() { 132 byte* current = Begin() + RoundUp(sizeof(ImageHeader), kObjectAlignment); 133 while (current < End()) { 134 DCHECK_ALIGNED(current, kObjectAlignment); 135 mirror::Object* obj = reinterpret_cast<mirror::Object*>(current); 136 CHECK(live_bitmap_->Test(obj)); 137 CHECK(obj->GetClass() != nullptr) << "Image object at address " << obj << " has null class"; 138 if (kUseBrooksPointer) { 139 CHECK(obj->GetBrooksPointer() == obj) 140 << "Bad Brooks pointer: obj=" << reinterpret_cast<void*>(obj) 141 << " brooks_ptr=" << reinterpret_cast<void*>(obj->GetBrooksPointer()); 142 } 143 current += RoundUp(obj->SizeOf(), kObjectAlignment); 144 } 145} 146 147ImageSpace* ImageSpace::Init(const char* image_file_name, bool validate_oat_file, 148 std::string* error_msg) { 149 CHECK(image_file_name != nullptr); 150 151 uint64_t start_time = 0; 152 if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) { 153 start_time = NanoTime(); 154 LOG(INFO) << "ImageSpace::Init entering image_file_name=" << image_file_name; 155 } 156 157 UniquePtr<File> file(OS::OpenFileForReading(image_file_name)); 158 if (file.get() == NULL) { 159 *error_msg = StringPrintf("Failed to open '%s'", image_file_name); 160 return nullptr; 161 } 162 ImageHeader image_header; 163 bool success = file->ReadFully(&image_header, sizeof(image_header)); 164 if (!success || !image_header.IsValid()) { 165 *error_msg = StringPrintf("Invalid image header in '%s'", image_file_name); 166 return nullptr; 167 } 168 169 // Note: The image header is part of the image due to mmap page alignment required of offset. 170 UniquePtr<MemMap> map(MemMap::MapFileAtAddress(image_header.GetImageBegin(), 171 image_header.GetImageSize(), 172 PROT_READ | PROT_WRITE, 173 MAP_PRIVATE | MAP_FIXED, 174 file->Fd(), 175 0, 176 false, 177 image_file_name, 178 error_msg)); 179 if (map.get() == NULL) { 180 DCHECK(!error_msg->empty()); 181 return nullptr; 182 } 183 CHECK_EQ(image_header.GetImageBegin(), map->Begin()); 184 DCHECK_EQ(0, memcmp(&image_header, map->Begin(), sizeof(ImageHeader))); 185 186 UniquePtr<MemMap> image_map(MemMap::MapFileAtAddress(nullptr, image_header.GetImageBitmapSize(), 187 PROT_READ, MAP_PRIVATE, 188 file->Fd(), image_header.GetBitmapOffset(), 189 false, 190 image_file_name, 191 error_msg)); 192 if (image_map.get() == nullptr) { 193 *error_msg = StringPrintf("Failed to map image bitmap: %s", error_msg->c_str()); 194 return nullptr; 195 } 196 uint32_t bitmap_index = bitmap_index_.FetchAndAdd(1); 197 std::string bitmap_name(StringPrintf("imagespace %s live-bitmap %u", image_file_name, 198 bitmap_index)); 199 UniquePtr<accounting::SpaceBitmap> bitmap( 200 accounting::SpaceBitmap::CreateFromMemMap(bitmap_name, image_map.release(), 201 reinterpret_cast<byte*>(map->Begin()), 202 map->Size())); 203 if (bitmap.get() == nullptr) { 204 *error_msg = StringPrintf("Could not create bitmap '%s'", bitmap_name.c_str()); 205 return nullptr; 206 } 207 208 Runtime* runtime = Runtime::Current(); 209 mirror::Object* resolution_method = image_header.GetImageRoot(ImageHeader::kResolutionMethod); 210 runtime->SetResolutionMethod(down_cast<mirror::ArtMethod*>(resolution_method)); 211 mirror::Object* imt_conflict_method = image_header.GetImageRoot(ImageHeader::kImtConflictMethod); 212 runtime->SetImtConflictMethod(down_cast<mirror::ArtMethod*>(imt_conflict_method)); 213 mirror::Object* default_imt = image_header.GetImageRoot(ImageHeader::kDefaultImt); 214 runtime->SetDefaultImt(down_cast<mirror::ObjectArray<mirror::ArtMethod>*>(default_imt)); 215 216 mirror::Object* callee_save_method = image_header.GetImageRoot(ImageHeader::kCalleeSaveMethod); 217 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), Runtime::kSaveAll); 218 callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsOnlySaveMethod); 219 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), Runtime::kRefsOnly); 220 callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsAndArgsSaveMethod); 221 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), Runtime::kRefsAndArgs); 222 223 UniquePtr<ImageSpace> space(new ImageSpace(image_file_name, map.release(), bitmap.release())); 224 if (kIsDebugBuild) { 225 space->VerifyImageAllocations(); 226 } 227 228 space->oat_file_.reset(space->OpenOatFile(image_file_name, error_msg)); 229 if (space->oat_file_.get() == nullptr) { 230 DCHECK(!error_msg->empty()); 231 return nullptr; 232 } 233 234 if (validate_oat_file && !space->ValidateOatFile(error_msg)) { 235 DCHECK(!error_msg->empty()); 236 return nullptr; 237 } 238 239 if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) { 240 LOG(INFO) << "ImageSpace::Init exiting (" << PrettyDuration(NanoTime() - start_time) 241 << ") " << *space.get(); 242 } 243 return space.release(); 244} 245 246OatFile* ImageSpace::OpenOatFile(const char* image_path, std::string* error_msg) const { 247 const ImageHeader& image_header = GetImageHeader(); 248 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(image_path); 249 250 OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatDataBegin(), 251 !Runtime::Current()->IsCompiler(), error_msg); 252 if (oat_file == NULL) { 253 *error_msg = StringPrintf("Failed to open oat file '%s' referenced from image %s: %s", 254 oat_filename.c_str(), GetName(), error_msg->c_str()); 255 return nullptr; 256 } 257 uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum(); 258 uint32_t image_oat_checksum = image_header.GetOatChecksum(); 259 if (oat_checksum != image_oat_checksum) { 260 *error_msg = StringPrintf("Failed to match oat file checksum 0x%x to expected oat checksum 0x%x" 261 " in image %s", oat_checksum, image_oat_checksum, GetName()); 262 return nullptr; 263 } 264 return oat_file; 265} 266 267bool ImageSpace::ValidateOatFile(std::string* error_msg) const { 268 CHECK(oat_file_.get() != NULL); 269 for (const OatFile::OatDexFile* oat_dex_file : oat_file_->GetOatDexFiles()) { 270 const std::string& dex_file_location = oat_dex_file->GetDexFileLocation(); 271 uint32_t dex_file_location_checksum; 272 if (!DexFile::GetChecksum(dex_file_location.c_str(), &dex_file_location_checksum, error_msg)) { 273 *error_msg = StringPrintf("Failed to get checksum of dex file '%s' referenced by image %s: " 274 "%s", dex_file_location.c_str(), GetName(), error_msg->c_str()); 275 return false; 276 } 277 if (dex_file_location_checksum != oat_dex_file->GetDexFileLocationChecksum()) { 278 *error_msg = StringPrintf("ValidateOatFile found checksum mismatch between oat file '%s' and " 279 "dex file '%s' (0x%x != 0x%x)", 280 oat_file_->GetLocation().c_str(), dex_file_location.c_str(), 281 oat_dex_file->GetDexFileLocationChecksum(), 282 dex_file_location_checksum); 283 return false; 284 } 285 } 286 return true; 287} 288 289OatFile* ImageSpace::ReleaseOatFile() { 290 CHECK(oat_file_.get() != NULL); 291 return oat_file_.release(); 292} 293 294void ImageSpace::Dump(std::ostream& os) const { 295 os << GetType() 296 << " begin=" << reinterpret_cast<void*>(Begin()) 297 << ",end=" << reinterpret_cast<void*>(End()) 298 << ",size=" << PrettySize(Size()) 299 << ",name=\"" << GetName() << "\"]"; 300} 301 302} // namespace space 303} // namespace gc 304} // namespace art 305